posix/src/pthread_attr.c

/*
# Copyright (C) 2024 HiHope Open Source Organization .
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

 */

#include <errno.h>
#include <pthread.h>
#include <limits.h>

int pthread_attr_init(pthread_attr_t *attr)
{
    if (attr == NULL) {
        return EINVAL;
    }

    attr->detachstate                 = PTHREAD_CREATE_JOINABLE;
    attr->schedpolicy                 = SCHED_RR;
    attr->schedparam.sched_priority   = LOSCFG_BASE_CORE_TSK_DEFAULT_PRIO;
    attr->inheritsched                = PTHREAD_INHERIT_SCHED;
    attr->scope                       = PTHREAD_SCOPE_PROCESS;
    attr->stackaddr_set               = 0;
    attr->stackaddr                   = NULL;
    attr->stacksize_set               = 1;
    attr->stacksize                   = LOSCFG_BASE_CORE_TSK_DEFAULT_STACK_SIZE;

    return 0;
}

int pthread_attr_destroy(pthread_attr_t *attr)
{
    if (attr == NULL) {
        return EINVAL;
    }

    /* Nothing to do here... */
    return 0;
}

int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachState)
{
    if ((attr != NULL) && ((detachState == PTHREAD_CREATE_JOINABLE) || (detachState == PTHREAD_CREATE_DETACHED))) {
        attr->detachstate = (UINT32)detachState;
        return 0;
    }

    return EINVAL;
}

int pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachState)
{
    if ((attr == NULL) || (detachState == NULL)) {
        return EINVAL;
    }

    *detachState = (int)attr->detachstate;

    return 0;
}

int pthread_attr_setscope(pthread_attr_t *attr, int scope)
{
    if (attr == NULL) {
        return EINVAL;
    }

    if (scope == PTHREAD_SCOPE_PROCESS) {
        attr->scope = (unsigned int)scope;
        return 0;
    }

    if (scope == PTHREAD_SCOPE_SYSTEM) {
        return ENOTSUP;
    }

    return EINVAL;
}

int pthread_attr_getscope(const pthread_attr_t *attr, int *scope)
{
    if ((attr == NULL) || (scope == NULL)) {
        return EINVAL;
    }

    *scope = (int)attr->scope;

    return 0;
}

int pthread_attr_setinheritsched(pthread_attr_t *attr, int inherit)
{
    if ((attr != NULL) && ((inherit == PTHREAD_INHERIT_SCHED) || (inherit == PTHREAD_EXPLICIT_SCHED))) {
        attr->inheritsched = (UINT32)inherit;
        return 0;
    }

    return EINVAL;
}

int pthread_attr_getinheritsched(const pthread_attr_t *attr, int *inherit)
{
    if ((attr == NULL) || (inherit == NULL)) {
        return EINVAL;
    }

    *inherit = (int)attr->inheritsched;

    return 0;
}

int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy)
{
    if ((attr != NULL) && (policy == SCHED_RR)) {
        attr->schedpolicy = SCHED_RR;
        return 0;
    }

    return EINVAL;
}

int pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy)
{
    if ((attr == NULL) || (policy == NULL)) {
        return EINVAL;
    }

    *policy = (int)attr->schedpolicy;

    return 0;
}

int pthread_attr_setschedparam(pthread_attr_t *attr, const struct sched_param *param)
{
    if ((attr == NULL) || (param == NULL)) {
        return EINVAL;
    } else if ((param->sched_priority < OS_TASK_PRIORITY_HIGHEST) ||
               (param->sched_priority >= OS_TASK_PRIORITY_LOWEST)) {
        return ENOTSUP;
    }

    attr->schedparam = *param;

    return 0;
}

int pthread_attr_getschedparam(const pthread_attr_t *attr, struct sched_param *param)
{
    if ((attr == NULL) || (param == NULL)) {
        return EINVAL;
    }

    *param = attr->schedparam;

    return 0;
}

/*
 * Set starting address of stack. Whether this is at the start or end of
 * the memory block allocated for the stack depends on whether the stack
 * grows up or down.
 */
int pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackAddr)
{
    if (attr == NULL) {
        return EINVAL;
    }

    attr->stackaddr_set = 1;
    attr->stackaddr     = stackAddr;

    return 0;
}

int pthread_attr_getstackaddr(const pthread_attr_t *attr, void **stackAddr)
{
    if (((attr != NULL) && (stackAddr != NULL)) && attr->stackaddr_set) {
        *stackAddr = attr->stackaddr;
        return 0;
    }

    return EINVAL; /* Stack address not set, return EINVAL. */
}

int pthread_attr_setstacksize(pthread_attr_t *attr, size_t stackSize)
{
    /* Reject inadequate stack sizes */
    if ((attr == NULL) || (stackSize < PTHREAD_STACK_MIN)) {
        return EINVAL;
    }

    attr->stacksize_set = 1;
    attr->stacksize     = stackSize;

    return 0;
}

int pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *stackSize)
{
    /* Reject attempts to get a stack size when one has not been set. */
    if ((attr == NULL) || (stackSize == NULL) || (!attr->stacksize_set)) {
        return EINVAL;
    }

    *stackSize = attr->stacksize;

    return 0;
}